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Catalysts 2015, 5(1), 40-57; doi:10.3390/catal5010040

Design of Pt/Carbon Xerogel Catalysts for PEM Fuel Cells

1
Laboratory of Chemical Engineering—Nanomaterials, Catalysis, Electrochemistry, University of Liège (B6a), B-4000 Liège, Belgium
2
College of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing 210046, China
*
Author to whom correspondence should be addressed.
Academic Editor: Minhua Shao
Received: 3 December 2014 / Accepted: 9 January 2015 / Published: 28 January 2015
(This article belongs to the Special Issue Electrocatalysis in Fuel Cells)
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Abstract

The design of efficient catalytic layers of proton exchange membrane fuel cells (PEMFCs) requires the preparation of highly-loaded and highly-dispersed Pt/C catalysts. During the last few years, our work focused on the preparation of Pt/carbon xerogel electrocatalysts, starting from simple impregnation techniques that were further optimized via the strong electrostatic adsorption (SEA) method to reach high dispersion and a high metal weight fraction. The SEA method, which consists of the optimization of the precursor/support electrostatic impregnation through an adequate choice of the impregnation pH with regard to the support surface chemistry, leads to very well-dispersed Pt/C samples with a maximum 8 wt.% Pt after drying and reduction under H2. To increase the metal loading, the impregnation-drying-reduction cycle of the SEA method can be repeated several times, either with fresh Pt precursor solution or with the solution recycled from the previous cycle. In each case, a high dispersion (Pt particle size ~3 nm) is obtained. Finally, the procedure can be simplified by combination of the SEA technique with dry impregnation, leading to no Pt loss during the procedure. View Full-Text
Keywords: carbon-supported Pt catalysts; PEM fuel cells; dispersion; catalyst synthesis; carbon xerogel carbon-supported Pt catalysts; PEM fuel cells; dispersion; catalyst synthesis; carbon xerogel
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Job, N.; Lambert, S.D.; Zubiaur, A.; Cao, C.; Pirard, J.-P. Design of Pt/Carbon Xerogel Catalysts for PEM Fuel Cells. Catalysts 2015, 5, 40-57.

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